MP1580HS-LF-Z Equivalent & Substitute Parts

Part Overview

The MP1580HS-LF-Z is a buck switching regulator IC from Monolithic Power Systems Inc., designed for positive adjustable output applications with 2A output current capability. This device operates across a 4.75V to 25V input voltage range and delivers adjustable output from 1.22V to 21V. The part is classified as "Not For New Designs," making identification of suitable alternatives essential for ongoing production and new development initiatives. The MP9942GJ-P serves as the manufacturer-recommended substitute, offering enhanced specifications and active product status.

Substiute Parts

MP1580HS-LF-Z

Monolithic Power Systems Inc.In Stock: 24079MP1580HS-LF-Z Datasheet

Current PartRFQ

MP9942GJ-P

Monolithic Power Systems Inc.In Stock: 2041MP9942GJ-P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The MP9942GJ-P is identified as the manufacturer-recommended substitute for the MP1580HS-LF-Z based on the following substitution criteria:

Core Functional Equivalence:

• Both devices are buck switching regulators with positive adjustable output configuration
• Both support 2A output current capacity
• Both feature synchronous rectification for improved efficiency
• Both operate across overlapping input voltage ranges with enhanced maximum input capability (MP9942GJ-P: 4V – 30V vs. MP1580HS-LF-Z: 4.75V – 25V)
• Both support adjustable output voltage with extended range on the substitute (MP9942GJ-P: 0.8V – 28.5V vs. MP1580HS-LF-Z: 1.22V – 21V)

Thermal and Compliance Alignment:

• Identical operating temperature range: -40°C to 125°C (TJ)
• Both ROHS3 compliant and REACH unaffected
• Both classified under ECCN EAR99 and HTSUS 8542.39.0001

Key Differentiators:

• Package format differs: MP1580HS-LF-Z uses 8-SOIC; MP9942GJ-P uses SOT-23-8 Thin (TSOT-23-8)
• Switching frequency: MP1580HS-LF-Z operates at 380kHz; MP9942GJ-P at 410kHz
• Product status: MP1580HS-LF-Z is not recommended for new designs; MP9942GJ-P is active
• Moisture sensitivity: MP1580HS-LF-Z rated MSL 2 (1 Year); MP9942GJ-P rated MSL 1 (Unlimited)

Parameter Comparison

Engineering Selection Recommendations

For Existing Designs Using MP1580HS-LF-Z:

The MP9942GJ-P is the manufacturer-recommended substitute and is suitable for direct replacement in applications where the package transition from 8-SOIC to SOT-23-8 Thin can be accommodated. The substitute offers superior specifications including extended input and output voltage ranges, active product status, and improved moisture sensitivity rating (MSL 1 vs. MSL 2).

For New Development:

The MP9942GJ-P should be selected as the primary component choice. Its active product status ensures long-term availability and supply chain stability. The enhanced electrical specifications provide greater design flexibility for variable input and output voltage requirements.

Package Transition Considerations:

PCB layout modifications are required due to the package format change from 8-SOIC to SOT-23-8 Thin. Both packages are surface-mount configurations with identical pin counts (8 pins), but physical dimensions and pin spacing differ. Thermal performance characteristics may vary due to package geometry differences.

Compliance and Reliability:

Both devices maintain ROHS3 compliance and REACH unaffected status. The MP9942GJ-P's superior MSL rating (1 vs. 2) indicates better performance in moisture-sensitive storage and handling environments, particularly for extended shelf life applications.

Frequently Asked Questions (FAQ)

Q: Can MP9942GJ-P directly replace MP1580HS-LF-Z without circuit modifications?

A: Functional replacement is possible due to identical output current rating, topology, and operating temperature range. However, package format differs (8-SOIC vs. SOT-23-8 Thin), requiring PCB layout redesign. Verify that the extended voltage ranges of MP9942GJ-P (4V – 30V input, 0.8V – 28.5V output) are compatible with your application requirements.

Q: What are the key electrical differences between these parts?

A: MP9942GJ-P provides wider input voltage range (4V minimum vs. 4.75V) and higher maximum input (30V vs. 25V). Output voltage range is also extended on the substitute (0.8V minimum vs. 1.22V, and 28.5V maximum vs. 21V). Switching frequency differs slightly (410kHz vs. 380kHz). All other core specifications remain equivalent.

Q: Why is MP1580HS-LF-Z marked "Not For New Designs"?

A: This designation indicates the part is in mature or end-of-life status. Monolithic Power Systems Inc. recommends MP9942GJ-P for new development to ensure long-term component availability and access to manufacturing support.

Q: Are there thermal performance differences due to package changes?

A: Package geometry affects thermal dissipation characteristics. SOT-23-8 Thin (TSOT-23-8) and 8-SOIC have different thermal resistance profiles. Thermal analysis specific to your application's power dissipation requirements is necessary to confirm adequate heat management with the substitute package.

Q: What is the significance of the MSL rating difference?

A: MP1580HS-LF-Z carries MSL 2 (1 Year), while MP9942GJ-P carries MSL 1 (Unlimited). This indicates MP9942GJ-P has superior moisture resistance and can be stored longer without baking requirements, reducing handling complexity in manufacturing environments.

Q: Are both parts available in the same packaging format (Tape & Reel)?

A: MP1580HS-LF-Z packaging information is not specified in the provided data. MP9942GJ-P is available in Tape & Reel (TR) format. Confirm packaging availability with your supplier for production volume requirements.

Q: Do both parts require identical external component values?

A: While both are adjustable buck regulators with the same output current rating, the extended voltage ranges of MP9942GJ-P may affect feedback network calculations. Verify feedback resistor values and compensation network design for your specific output voltage target.